1. Wireless Audio Conferencing System (WACS) Mehmet Ali Abbasoğlu Furkan Çimen Aylin Deveci Kübra Gümüş

2. Project Description  Wireless Ad-Hoc Network communication in wider area by hopping from node to node  Multiple users will be able to talk simultaneously without needing an access point and Internet

3. Software Requirements  Functional Requirements See all connected users to WLAN Send request -> Accept / Reject  Non-Functional Requirements For fluid conversation, fast&efficient voice transfer Full-duplex-> speak&heard at the same time

4. Technologies Used  Hardware Technologies Laptop with 802.11b Wireless technology Microphone & speaker  Software Technologies Eclipse IDE Netbeans Java Media Framework (JMF) library

5. Java Media Framework (JMF)  Enables audio, video and other time-based media to be added to applications and applets built on Java technology.  Capture, playback, stream, and transcode multiple media formats, extends the Java 2 Platform, Standard Edition (J2SE) for multimedia developers by providing a powerful toolkit to develop scalable, cross- platform technology.

6. JMF Structure  data sources (Data source)  interception equipment (Capture Device, including the interception of video and audio equipment)  player (Player)  processor (Processor)  data format (Format)  Manager (Manager)

7. Real-time Transport Protocol (RTP )  RTP is an end to end transport layer protocol intended for transmitting real- time data such as audio and video.  RTP has a companion protocol called RTP Control Protocol ( RTCP) whose role is to monitor the quality of data delivery offered by the RTP.

8. Why we used RTP?  TCP is not an appropriate choice for carrying real-time multimedia contents Multimedia contents do not demand the 100% reliability Overhead introduced by TCP causes large amount of delay in receiving the data and makes the application less interactive  UDP is also unsuitable for multimedia transmission UDP does not guarantee ordered delivery of packets

9. The networking protocol stack with JMF RTP API

10. DEMO

11. What we have learned?  Hardware access from software  UDP and datagram  JMF and RTP

12. Future Plans  View all connected clients in the wireless network area  Multi-hop communication  User friendly GUI

13. Thank You for Your Listening Any Questions?